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// CONDITIONS OF ANY KIND, either express or implied. See the License for the
// specific language governing permissions and limitations under the License.

#ifndef RAPIDJSON_READER_H_
#define RAPIDJSON_READER_H_

/*! \file reader.h */

#include "allocators.h"
#include "stream.h"
#include "encodedstream.h"
#include "internal/meta.h"
#include "internal/stack.h"
#include "internal/strtod.h"
#include <limits>

#if defined(RAPIDJSON_SIMD) && defined(_MSC_VER)
#include <intrin.h>
#pragma intrinsic(_BitScanForward)
#endif
#ifdef RAPIDJSON_SSE42
#include <nmmintrin.h>
#elif defined(RAPIDJSON_SSE2)
#include <emmintrin.h>
#elif defined(RAPIDJSON_NEON)
#include <arm_neon.h>
#endif

#ifdef _MSC_VER
RAPIDJSON_DIAG_PUSH
RAPIDJSON_DIAG_OFF(4127)  // conditional expression is constant
RAPIDJSON_DIAG_OFF(4702)  // unreachable code
#endif

#ifdef __clang__
RAPIDJSON_DIAG_PUSH
RAPIDJSON_DIAG_OFF(old-style-cast)
RAPIDJSON_DIAG_OFF(padded)
RAPIDJSON_DIAG_OFF(switch-enum)
#endif

#ifdef __GNUC__
RAPIDJSON_DIAG_PUSH
RAPIDJSON_DIAG_OFF(effc++)
#endif

//!@cond RAPIDJSON_HIDDEN_FROM_DOXYGEN
#define RAPIDJSON_NOTHING /* deliberately empty */
#ifndef RAPIDJSON_PARSE_ERROR_EARLY_RETURN
#define RAPIDJSON_PARSE_ERROR_EARLY_RETURN(value) \
    RAPIDJSON_MULTILINEMACRO_BEGIN \
    if (RAPIDJSON_UNLIKELY(HasParseError())) { return value; } \
    RAPIDJSON_MULTILINEMACRO_END
#endif
#define RAPIDJSON_PARSE_ERROR_EARLY_RETURN_VOID \
    RAPIDJSON_PARSE_ERROR_EARLY_RETURN(RAPIDJSON_NOTHING)
//!@endcond

/*! \def RAPIDJSON_PARSE_ERROR_NORETURN
    \ingroup RAPIDJSON_ERRORS
    \brief Macro to indicate a parse error.
    \param parseErrorCode \ref rapidjson::ParseErrorCode of the error
    \param offset  position of the error in JSON input (\c size_t)

    This macros can be used as a customization point for the internal
    error handling mechanism of RapidJSON.

    A common usage model is to throw an exception instead of requiring the
    caller to explicitly check the \ref rapidjson::GenericReader::Parse's
    return value:

    \code
    #define RAPIDJSON_PARSE_ERROR_NORETURN(parseErrorCode,offset) \
       throw ParseException(parseErrorCode, #parseErrorCode, offset)

    #include <stdexcept>               // std::runtime_error
    #include "rapidjson/error/error.h" // rapidjson::ParseResult

    struct ParseException : std::runtime_error, rapidjson::ParseResult {
      ParseException(rapidjson::ParseErrorCode code, const char* msg, size_t offset)
        : std::runtime_error(msg), ParseResult(code, offset) {}
    };

    #include "rapidjson/reader.h"
    \endcode

    \see RAPIDJSON_PARSE_ERROR, rapidjson::GenericReader::Parse
 */
#ifndef RAPIDJSON_PARSE_ERROR_NORETURN
#define RAPIDJSON_PARSE_ERROR_NORETURN(parseErrorCode, offset) \
    RAPIDJSON_MULTILINEMACRO_BEGIN \
    RAPIDJSON_ASSERT(!HasParseError()); /* Error can only be assigned once */ \
    SetParseError(parseErrorCode, offset); \
    RAPIDJSON_MULTILINEMACRO_END
#endif

/*! \def RAPIDJSON_PARSE_ERROR
    \ingroup RAPIDJSON_ERRORS
    \brief (Internal) macro to indicate and handle a parse error.
    \param parseErrorCode \ref rapidjson::ParseErrorCode of the error
    \param offset  position of the error in JSON input (\c size_t)

    Invokes RAPIDJSON_PARSE_ERROR_NORETURN and stops the parsing.

    \see RAPIDJSON_PARSE_ERROR_NORETURN
    \hideinitializer
 */
#ifndef RAPIDJSON_PARSE_ERROR
#define RAPIDJSON_PARSE_ERROR(parseErrorCode, offset) \
    RAPIDJSON_MULTILINEMACRO_BEGIN \
    RAPIDJSON_PARSE_ERROR_NORETURN(parseErrorCode, offset); \
    RAPIDJSON_PARSE_ERROR_EARLY_RETURN_VOID; \
    RAPIDJSON_MULTILINEMACRO_END
#endif

#include "error/error.h" // ParseErrorCode, ParseResult

RAPIDJSON_NAMESPACE_BEGIN

///////////////////////////////////////////////////////////////////////////////
// ParseFlag